Combined mixing and staining dental slab



FIG. 1 shows a top plan view of a combined mixing and staining dental slab showing my new design;

FIG. 2 is a side elevational view viewed from the right side of my new design as shown in FIG. 1;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a rear elevational view thereof; and

FIG. 5 is a bottom plan view thereof. 

The ornamental design for a combined mixing and staining dental slab, as shown and described. 